Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, so the safety profile is covered, but the description adds nothing beyond that: it does not say whether dismissed alerts are excluded from the response by default, what fields come back, or what an invalid/unknown ID yields. For a single-record retrieval where the default visibility of dismissed alerts is a meaningful behavior, this is a real gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.